Installation for manufacturing a part by implementing a Bridgman method

Abstract

An installation for manufacturing a part by implementation of a Bridgman method includes in particular a mold intended to receive a melted material and a thermal screen movable with respect to the mold intended to be positioned in front of the solidification front during the directional solidification.

The invention claimed is: 
     
       1. An installation for manufacturing a part by implementation of a Bridgman method, said installation comprising:
 at least one mold intended to receive a melted material, the at least one mold being present in a heating zone situated inside an enclosure; 
 a cooling zone situated inside the enclosure and separated from the heating zone by a first thermal screen, the first thermal screen being fixed with respect to the enclosure and being situated on a first side of the at least one mold, the heating zone being superimposed on the cooling zone along an axis of the enclosure; 
 a first movement system configured to move the at least one mold in the enclosure from the heating zone to the cooling zone along the axis of the enclosure; 
 a second thermal screen movable with respect to the at least one mold, distinct from the first thermal screen and situated on a second side of the at least one mold opposite to the first side; 
 a second movement system, distinct from the first movement system, configured to move the second thermal screen in the enclosure along the axis of the enclosure, 
 an additional thermal screen movable with respect to the at least one mold and distinct from the first and second thermal screens, the additional thermal screen being situated on the second side of the at least one mold and being superimposed on the second thermal screen along the axis of the enclosure, the width of the additional thermal screen being less than the width of the second thermal screen, and 
 a third movement system, distinct from the first and second movement systems, configured to move the additional thermal screen in the enclosure along the axis of the enclosure independently of the second thermal screen. 
 
     
     
       2. The installation according to  claim 1 , further comprising a third thermal screen fixed with respect to the enclosure, distinct from the first and second thermal screens and from the additional thermal screen, said third thermal screen being present in the heating zone and being superimposed on the first thermal screen along the axis of the enclosure. 
     
     
       3. The installation according to  claim 1 , comprising a plurality of molds intended to receive the melted material and present in the heating zone, said plurality of molds being present around the second thermal screen, the installation further comprising a heating system configured to heat the heating zone, the heating system and the first thermal screen being present around said plurality of molds. 
     
     
       4. A method for manufacturing at least one part by implementation of a Bridgman method and of the installation according to  claim 1 , the method comprising:
 introduction of a melted material into said at least one mold, 
 directional solidification of the melted material by moving said at least one mold comprising the melted material from the heating zone toward the cooling zone along the axis of the enclosure by activating the first movement system, and 
 movement of the second thermal screen along the axis of the enclosure by activating the second movement system so as to position the second thermal screen in front of the solidification front of the melted material during a first phase of the directional solidification, then the additional thermal screen being moved along the axis of the enclosure by actuation of the third movement system so as to position the additional thermal screen in front of the solidification front of the melted material during a second phase of the directional solidification. 
 
     
     
       5. The method according to  claim 4 , wherein the part is a turbomachine part. 
     
     
       6. The method according to  claim 5 , wherein the part is a turbomachine blade. 
     
     
       7. The method according to  claim 4 , wherein the melted material is a metal material or a ceramic material.